Reamer bar supporting bracket



Dec. 29, 1931. w s o REAMER BAR SUPPORTING BRACKET Filed June 27, 1927 2Sheets-Sheet 1 Dec. 29, 1931. R. WISHON REAMER BAR SUPPORTING BRACKETFiled June 27, 1927 2 Sheets-Sheet 2 Patented Dec. 29, 1931 l r r s iUNITED STATES T HWI RALPH wrsnon, OF cnIcAoo; ILLINOIS, ASSIGNOR TD. oneminor columnar, a con;

V romrxonor rrmnols V nnAMER BAR 'surronrine BRACKET Application filedJune 27, 1927; 'Serial No. 201 75)! This invention relates to :a reamerbar :suption'al' view taken on line- VIIVII of Figportingbracket. V rure5. l I a It isan object of this invention to pro- Figure 8 is: atransverse sectional View vide a reamer bar supportingbraoketadaptthrough a-cra'nk: case illustrating the device 5 ed' tobeclamped to a crank case or the like in position for reaming a camshaftbearing.

and provided with an arm adjustable. as to .As'shown on the drawings?length and angular relation and carrying a The reference numeral 1indicates as aselTf-alignihg bearing forlaligningthe reamer whole acrank case ofthe type to be found in: bar with'a main crankshaft bearingor :caminternal combustion engines. in order to shaft bearing to bereamed." ream -out the main crankshaft bearings 01'' It is a furtherobject of this invention to the cam-shaft bearings, the crank case 1 isprovide a reamer bar suppo'rting bracket that supported in invertedposition and a-"plus maybe readily secured at any place along itsra'lity of reamer :bar supporting brackets :2 length to a crank case orthe like and thatloi my invention are secured to the bottom 15 Icarriesa self-aligning hearing which, after flange 3 thereof, transversely "ofthenalength alignment with the bearings to :be reamed, of the crankcase;7

may be olamped in that position without dis- Eachof the reamer barsupporting brackets j turbing the alignment. I 2 comprises a pair oibars 4 identicalli n'form Other and further important objects of andspaced apart by means of spaoingbush zothis invention will becomeapparent tromthe ings 5 through .which extend clamping disclosures inthe following description and bolts 6. Said bars 4 are :of sufiicientlength appendedc'l-aim;' to extend beyond the sides of the crank In theaccompanyi g drawings which case 1 and are secured to the flanges 3illustrate a preferred embodiment of this inof said crankcase 1 by meansof bolts 7 ex- 25 vention and in which similar referencen:utendingbetween the bars-{l and through apermorals refer oo-similarfeatures in the d ifiertunes 8 in the flanges 3. Washers 9 are pro-' entviews: vided on the'upper ends of the bolts '7 to Figure 1 is a top planview of an inverted form a-bearing against the upper faces of crankoaseillus'trating the use of devices emthe bars bodying the principlesof my'inventionin Each of said lleamerdbail ppo reaming the maincrankshaft bearings. brackets 2 i fi m fi h f fl g d.

Figure 2 is a sectional view taken on line Portion 1 havlng aseml'cylmdrlcal Tecesfi H41 Figure with in 61mmthat ii: iii? iiiiiiiiiii'eiiinggi i Flgure 3 1S sectlonalvlew aken on lime An adjustablesplit arm 13is positioned betvveenthe enlarged portions 10 of the barsat and for thispurpose is provided with an elongated slot 14 forreceiving a clamping bolt'15 extending through said enlarged por tions10. Said arm 13, which is thus -adju st-' 3 111411 of Figure 1.

Figure 4 is an enlarged sectional view taken on line IV-IV'of Figurec3,with parts in elevation and-parts removed. a

Figure 5 is an enlarged sectional view W 011-11119 F 125 e Wlth Partsable as to length and angular relation with 111 l i V respect to the"bars' l, carries at its lower end lg re 6 56617101131 View taken on11116 a zself ali-gning bearinglfi. Said bearing 16 VI+VI of Figure, 5,with partsinelevationis formed with spherical faces 17 (Figure 7);

45 j Figure 7 isv an enlarged ifragmentary :secclampingly held betweenthe concave spher'ical faces 18 of the split arm 13 so as to permit thebearing to be self-aligning. A bore 19 of sufiicient size to serve as aguide for a reamer bar 20 extends through said bearing 16.

As shown in Figures 1 to 6 inclusive, a plurality of reamer barsupporting brackets 2 are secured to the lower flanges 3 of the crankcase 1 with the recesses 11 in substantial alignment with the maincrankshaft bearings 12. A larger bracket 25 is mounted at one end ofsaid crankshaft to provide an external bearing for the reamer bar 20.The bolts 15 are then loosened. to permit adjustment of the arms 13until the bearings 16 are brought into substantial alignment with themain bearings 12. A reamer bar 14 is then inserted through the mainbearings 12 and the self-aligning bearings 16 carried said arms 13.Temporary bushings are placed in the main bearing supports 21 and thereamer bar 20 aligned therein. The bolts 15 are then tightened in adirection parallel to the reamer bar to tightly clamp the arms 18 in thecorrect position. The temporary bushings and reamer bar 20 are removedand the bearing linings 22 to be reamed secured in place upon thebearing supports 21. The reamer bar 20 is then fitted with adjustablereamers 23, such as described in my copending application entitled,Adjustable reamer, Serial No. 201,757, filed June 27, 1927, and the bar20 inserted in position in the bearings 16. Said bearings 16 beingselfaligning, will automatically center the reamer bar 20 in the correctposition for reaming the main bearings 12. The blades of the adjustablereamers 23 are expanded as disclosed in my application above referred toand the reaming process carried out by rotating the reamer bar 20.

It will be apparent that the reamer bar supporting brackets of myinvention are thus readily adjustable to any size of crank case and thatthe self-aligning bearings 16 provide accurate self-centering means forthe reamer carrying pilot bar. Since the bolts 15 extend at right anglesto the said arms 13, there is no possibility of the bearings 16 gettingout of alignment with the main crankshaft bearings 12 after thepreliminary alignment during the final clamping operation. a

In Figure 8 there is illustrated a reamer bar supporting bracket 2 withthe adjustable arm 13 positioned for reaming a camshaft bearing 24;.This adjustment may be effected without changing the position of thereamer bar 2, simply by loosening the bolt 15 and sliding the arm 13into the desired angular position with respect to the reamer barsupporting bracket 2. The bolt is then tightened when the bearing 16 isin alignment with the camshaft bearing 24. The simplicity of the deviceand the ease with which. it may be manipulated will be appreciated bythose familiar with the reaming of crankshaft and camshaft bearin s.Obviously, my device may be employe wherever bearings are to be reamed,but, for purposes of illustration, the operation has been described inconnec tion with the reaming of crankshaft and camshaft bearings ofinternal combustion engines.

The operation of the device is as follows:

The bearings to be reamed are exposed by removing the usual bushings andtemporary bushings of proper size are inserted in the bearings foraiding in aligning the reamer bar. The brackets are then secured to thecrank case, the single attaching means for the several arms are loosenedand the reamer bar inserted in the universal self-aligning bearings 19in the arms 13. The bar is then properly aligned with respect to thebushings and all of the single fastening means for the several adjustingarms tightened. This results in perfectalignment of the reamer bar inthe floating universal bearings in the several bearing arms, whichalignment remains fixed and uniform until the reaming operation iscompleted. The temporary bushings are then removed and the reamer barthen rotated to ream the bearings in the crank case so that when reamedproperly new bushings may be installed with the assurance that the crankshaft will thereafter be properly aligned in such bearings and bushings.

It is to be observed that the mechanism of the present invention enablesquick and positive adjustment of the several bearing arms so that alldanger of boring bar cramping or springing iseliminated. Furthermore,every one of the universal bearing arms is secured to its bracket by asingle fastening means, thereby allowing quick, easy, and certainadjustment of such arms.

The apparatus of the present invention requires little skill to properlyset up for reaming, is extremely accurate and mechanically correct. Theprovision of the floating universal self-aligning hearings in theseveral arms assures at all times that the reamer or boring bar isproperly aligned with respect to the bearing surfaces to be reamed;furthermore, the bar is supported so as to secure uniform, even, andaccurate results.

I am aware that many changes may be made in the construction of mydevice without departing from the principles of this invention and Itherefore, do not purpose to limit the patent granted hereon, otherwisethan necessitated by the prior art.

I claim as my invention:

A reamer bar support comprising a brackct, an arm connected to saidbracket at the central portion thereof and arranged for longitudinal andangular adjustment about its connection, a bolt passing through saidbracket and said arm for adjustably positioning said armon sa-idbracket, a universal bearing in one end of said arm, said bearingincluding a block having a spherical surface, said arm being split in aplane parallel to the sides of the arm, the split portions havingconcave recesses which together receive and retain said block inposition when said parts are secured together to permit univerm salmovement of said block Within said recesses, and said block having anaperture for a reamer bar. i

In testimony whereof I have hereunto subscribed my name at Chicago, CookCounty,

Illinois.

RALPH VVISHON.

